28
Two trains 300 m and 400 m long run at the speeds of 40 kmph and 50 kmph respectively in opposite directions on parallel tracks. The time taken to cross each other is:
- A15 sec
- B20 sec
- C28 sec
- D32 sec
Answer not set
Discussion 1
Log in or create a free account to reply and vote.
0
CCommunity
Length of two trains = 300 m + 400 m = 700 m
Relative speed = 40 + 50 = 90 kmph
∴ Time = distance/speed = 700/25 = 28 sec
Relative speed = 40 + 50 = 90 kmph
∴ Time = distance/speed = 700/25 = 28 sec